release: 0.64.0 — R13 sort/filter idiom unification + Hidden tab

Bump VERSION to 0.64.0 and add the user-facing release-notes entry for
the R13 sprint (unified sort/filter controls, Hidden channels tab,
channel-manager toolbar declutter, filter-rail jitter fix).

VERSION

@@ -1 +1 @@
-0.63.3
+0.64.0

frontend/src/lib/releaseNotes.ts

@@ -14,6 +14,23 @@ export interface ReleaseEntry {
 }
 
 export const RELEASE_NOTES: ReleaseEntry[] = [
+  {
+    version: "0.64.0",
+    date: "2026-08-15",
+    summary:
+      "A consistency pass across the app: sorting and filtering now look and work the same everywhere, and the channel manager toolbar is tidier.",
+    features: [
+      "Hidden channels now have their own “Hidden” tab in the channel manager, separate from Blocked — so you can see and un-hide them at a glance.",
+      "Sorting and filtering work the same way everywhere now — the feed, Plex, the channel manager and discovery all share one sort control and one style of filter chips, with a row of active-filter chips you can clear one at a time.",
+      "Tidier channel-manager toolbar: the catalog actions (read subscriptions, backfill) tuck into a “⋯” menu, the catalog stats collapse into a “Stats” chip you hover for the numbers, and the tags editor opens from the “✎ Tags” label.",
+    ],
+    fixes: [
+      "Fixed a faint one-pixel jitter where the page could shift slightly when filters changed at certain zoom or text-size settings.",
+    ],
+    chores: [
+      "Large internal refactor unifying the shared UI controls (sort, filter chips, tabs, overflow menus) behind single reusable components, with new automated tests. No change to how anything looks beyond the consistency improvements above.",
+    ],
+  },
   {
     version: "0.63.3",
     date: "2026-08-13",